
package com.seo.utils;

import java.io.PrintWriter;
import java.net.InetAddress;
import java.net.UnknownHostException;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;

/**
 * CommonUtil
 * 
 * @author Administrator
 * @version 2017.12.01 11:40
 */
public class WebUtil {

    public static HttpServletRequest getRequest() {
        HttpServletRequest request = ((ServletRequestAttributes) RequestContextHolder
            .getRequestAttributes()).getRequest();
        return request;
    }

    public static HttpServletResponse getResponse() {
        HttpServletResponse response = ((ServletRequestAttributes) RequestContextHolder
            .getRequestAttributes()).getResponse();
        return response;
    }

    public static String getIpAddr() {
        try {
            HttpServletRequest request = getRequest();

            String ipAddress = request.getHeader("x-forwarded-for");
            if (ipAddress == null || ipAddress.length() == 0
                || "unknown".equalsIgnoreCase(ipAddress)) {
                ipAddress = request.getHeader("Proxy-Client-IP");
            }
            if (ipAddress == null || ipAddress.length() == 0
                || "unknown".equalsIgnoreCase(ipAddress)) {
                ipAddress = request.getHeader("WL-Proxy-Client-IP");
            }
            if (ipAddress == null || ipAddress.length() == 0
                || "unknown".equalsIgnoreCase(ipAddress)) {
                ipAddress = request.getRemoteAddr();
                if (ipAddress.equals("127.0.0.1") || ipAddress.equals("0:0:0:0:0:0:0:1")) {
                    //根据网卡取本机配置的IP  
                    InetAddress inet = null;
                    try {
                        inet = InetAddress.getLocalHost();
                    } catch (UnknownHostException e) {
                        e.printStackTrace();
                    }
                    ipAddress = inet.getHostAddress();
                }
            }
            //对于通过多个代理的情况，第一个IP为客户端真实IP,多个IP按照','分割  
            if (ipAddress != null && ipAddress.length() > 15) {
                if (ipAddress.indexOf(",") > 0) {
                    ipAddress = ipAddress.substring(0, ipAddress.indexOf(","));
                }
            }
            return ipAddress;
        } catch (Exception e) {
            e.printStackTrace();
            return "192.168.1.110";
        }

    }

    /**
     * url 跳转
     * @param response response
     * @param content content
     */
    public static void doBgReq(HttpServletResponse response, String content) {
        PrintWriter out = null;
        try {
            response.setContentType("text/html;charset=utf-8");
            out = response.getWriter();
            out.println(content);
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            if (out != null) {
                out.close();
            }
        }
    }
}